Wednesday's Olympics track and field action

Allyson Felix of the USA, center, leads the field out of the turn in the women's 200m. Felix won the gold medal, while Carmelita Jeter of the USA, left, won the bronze medal.
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Allyson Felix of the USA, second from right, leads Carmelita Jeter of the USA, left, Sanya Richards-Ross of the USA, right, and Murielle Ahoure of Cote d'Ivoire in the stretch of the women's 200m. Felix won the gold medal and Jeter the bronze medal. Richards-Ross finished in fifth place, while Ahoure finished sixth.
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Allyson Felix of the USA leads Sanya Richards-Ross of the USA in the stretch of the women's 200m. Felix won the gold medal, while Richards-Ross finished in fifth place.
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Allyson Felix of the USA celebrates after crossing the finish line in the women's 200m. Felix won the gold medal.
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Carmelita Jeter of the USA, left, and Shelly-Ann Fraser-Pryce of Jamaica celebrate after their medal-winning performances in the women's 200m. Fraser-Pryce won the silver medal in the race, and Jeter the bronze medal.
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The field breaks in the men's 110m hurdles. Aries Merritt of the USA in Lane 6 took the gold medal, while his teammate, Jason Richardson, in Lane 4 claimed the silver medal.
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Dayton Robles of Cuba, center, pulls up with an injury as he runs between Aries Merritt of the USA, left, and Jason Richardson of the USA in the men's 110m hurdles. Merritt won the gold medal, while Richardson claimed the silver medal.
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USA's Aries Merritt crosses the finish line in front of Jamaica's Hansle Parchment to win the gold medal in the men's 110m hurdles.
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USA's Aries Merritt, right, crosses the finish line to win the the gold medal in the men's 110m hurdles.
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USA's Aries Merritt, right, crosses the finish line to win the the gold medal in the men's 110m hurdles.
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Jason Richardson of the USA crosses the finish line in the men's 110m hurdles. Richardson took home the silver medal in the event.
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USA's Aries Merritt carries the American flag after winning the gold medal in the men's 110m hurdles.
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Lashinda Demurs of the USA clears a hurdle in the final stretch of the women's 400m hurdles. Demurs finished a close second to winner Natalya Antyukh of Russia.
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Lashinda Demurs of the USA, left, and Natalya Antyukh of Russia hit the finish line for the women's 400m hurdles. Demurs finished a close second to Antyukh.
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Lashinda Demurs of the USA lies disappointed on the track after she finished a very close second to winner Natalya Antyukh of Russia in the women's 400m hurdles.
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Natalya Antyukh of Russia celebrates after her win in the women's 400m hurdles.
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A disappointed Lashinda Demurs of the USA frowns before a television camera after she finished a very close second to winner Natalya Antyukh of Russia in the women's 400m hurdles.
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Usain Bolt of Jamaica, center, cruises to a win in a men's 200m race semifinal. The USA's Isiah Young, left, runs in lane 8. Young finished last in the semi.
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Usain Bolt of Jamaica cruises to a win in a men's 200m race semifinal.
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The USA's Isiah Young checks the scoreboard after his run in a 200m semifinal. Young finished last in his semifinal, and did not qualify for the final.
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Maurice Mitchell, center, of the USA runs between Brendan Christian of Antigua, right, and Christian Malcolm of Great Britain in a men's 200m race semifinal. Mitchell finished the semifinal in fifth place, and did not qualify for the 200m final.
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Maurice Mitchell of the USA checks the results of his 200m semifinal. Mitchell finished in fifth place, and did not qualify for the 200m final.
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